Lower orders comprehending students making fatuous remark (10)
I believe the answer is:
pleasantry
'remark' is the definition.
(I have seen 'Polite remark ' mean 'pleasantry' so perhaps 'remark' could also mean 'pleasantry')
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for pleasantry that I've seen before include "Source of laughter" , "Sally" , "Polite remark" , "Slightly amusing remark" , "facetious trick" .)